How can I use loop code on try, except code?

Question

Now I'm coding to get Change value (A day - A day of yesterday) and the data existing only working day so if no existing data of a day the code get KeyError. so I used Try, Except code but...so messy..I wanna combine below code.

    ydate = datetime.strptime(date, '%Y-%m-%d').date() - timedelta(days=1)
    sydate = str(ydate)
    try:
        yclose = data['Time Series (Daily)'][sydate]['4. close']
    except KeyError:
        try:
            ydate = datetime.strptime(date, '%Y-%m-%d').date() - timedelta(days=2)
            sydate = str(ydate)
            yclose = data['Time Series (Daily)'][sydate]['4. close']
        except KeyError:
            try:
                ydate = datetime.strptime(date, '%Y-%m-%d').date() - timedelta(days=3)
                sydate = str(ydate)
                yclose = data['Time Series (Daily)'][sydate]['4. close']
            except KeyError:
                    try:
                    ydate = datetime.strptime(date, '%Y-%m-%d').date() - timedelta(days=4)
                    sydate = str(ydate)
                    yclose = data['Time Series (Daily)'][sydate]['4. close']

Put your code in a function with a while True loop and return the values at the end of the try block. If the return is not hit, the loop will do an other round. — Klaus D.
– Klaus D., Commented Apr 6, 2020 at 7:43
Does this answer your question? How to improve code clarity in nested try-except-else clauses? — MisterMiyagi
– MisterMiyagi, Commented Apr 6, 2020 at 7:48

Badgy · Accepted Answer · 2020-04-06 07:38:29Z

2

Wrap it in a loop.

for x in range(0, 5):
    ydate = datetime.strptime(date, '%Y-%m-%d').date() - timedelta(days=x)
    sydate = str(ydate)
    try:
        yclose = data['Time Series (Daily)'][sydate]['4. close']
    except KeyError:
        continue

answered Apr 6, 2020 at 7:38

Badgy

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